Mycomya klossi Edwards, 1931

Väisänen, Rauno, 2014, New Mycomya species from South-East Asia (Diptera, Mycetophilidae), Zootaxa 3815 (4), pp. 526-540 : 529

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Mycomya klossi Edwards, 1931


Mycomya klossi Edwards, 1931

Figs. 2 View FIGURE 2 A–C

Mycomya klossi Edwards, 1931 . Edwards 1931 a: 488

Material studied. Holotype. ♂. MALAYSIA, N. Borneo, Bettotan. nr. Sandakan Aug. 18 th 1927. 2458. (NHM).

Description. ♂. Head. Palp, other mouthparts, face and posterior parts of head yellow, ocellar prominence brown. Antenna yellowish, scape, pedicel and base of 1 st flagellomere yellow. 1 st flagellomere about 1.5 x its width, 2 nd flagellomere 1 x its width. Thorax. Pronotum yellow, with 4 long setae. Scutum yellow to yellowish without distinct stripes. Anepisternum and preepisternum yellow. Scutellum brownish, with 4 long setae. Laterotergite yellowish. Mediotergite yellowish, bare. Wing. Length 2.5 mm. Wing hyaline, small cell and wing apex weakly infuscated. Sc ending in R 1 distad of middle of small cell, Sc 1 missing. Apical part of Sc bearing 9 small setae. Small cell about 2 x as long as wide. Cu fork slightly proximal to M fork. M ratios: 0.80, 1.00. Cu ratios: 0.67, 0.93. Small setae: M petiole: 0; M 1: 0; M 2: 0; Cu petiole: 0; Cu 1: 0; Cu 2: 0. Halter yellowish, apex brown. Legs. Coxae and femora yellow, tibiae and tarsi brownish. Coxa 2 without spur. Leg ratios: bt 1:t 1 = 0.82, bt 2:t 2 =?, bt 3:t 3 = 0.55. Abdomen. Tergites 1–5 yellow, with brownish posterior margins, 6–7 brownish. Sternites 1–5 yellow, 6–7 brownish. Hypopygium. Figs. 2 View FIGURE 2 A–C, yellow. Sternal lateral appendage relatively long, apically rounded, its subapical part about as wide as basal part, densely setose ( Fig. 2 View FIGURE 2 C). More than apical ½ of sternal synsclerite covered by long setae. Gonostylus with two teeth. Sternal submedian filament not visible due to poor condition of hypopygium.

Discussion. Edwards (1931) noted that in M. klossi “the venation and other characters indicate an affinity with the group of M. fimbriata Mg. ”, and based on his comment, Väisänen (1984 a) tentatively placed M. klossi in the subgenus Neomycomya Väisänen (the type species of which is Sciophila fimbriata Meigen , i.e. M. fimbriata ). However, M. klossi clearly belongs to the widely distributed subgenus Cymomya , based on the presence of the medial comb in the tergal part of the hypopygium lacking the tergal lateral appendages, and of the sternal synsclerite divided into two large lateral parts bearing wide, setose lateral appendages ( Väisänen 1984 a). Mycomya klossi is smaller (wing length 2.5 mm) than the other Oriental species of the subgenus, very pale, and with relatively conspicuous wing markings compared to the other Mycomya species, resembling those in the genus Neoempheria . The long, apically rounded shape of the sternal lateral appendage, with dense setosity, is diagnostic to M. klossi ( Fig. 2 View FIGURE 2 C). It is closely related to M. paraklossi sp. n., another yellowish species, with only the posterior margins of abdominal tergites 1–5 brown and large setose sternal lateral appendages. However, M. paraklossi is bigger than M. klossi and the subapical part of its sternal lateral appendage is much wider that the basal part ( Fig. 5 View FIGURE 5 C). Mycomya aonyx Väisänen from Myanmar is also quite similar to M. klossi , but its sternal lateral appendage is D-shaped ( Väisänen 2013 a: fig. 4 B) and not as symmetrically rounded as in M. klossi , it lacks the conspicuous wing markings, and it has a darker coloration, with abdominal tergites 1–5 brownish to brown, sometimes with yellowish anterolateral spots. The holotype of M. klossi was collected in a lowland area in Sabah, northern Borneo, in August by Messrs. C. Boden Kloss and H. M. Pendlebury. During their visit to British North Borneo in July–September, 1927 no ascents were made above 200 ft. (Edwards 1931). A large proportion of the biologically very diverse lowland forest in the Sandakan region has been recently converted into oil palm plantations.














Mycomya klossi Edwards, 1931

Väisänen, Rauno 2014

Mycomya klossi

Edwards 1931: 488